Hugh young



v H, YOUNG. Machine for Sawing Stone.

Patented F eb.'17, 1880.

' ri- PETERS, FI-l DTO-LITHOGRAPHER, WASHINGTON, p, c,

HUGH YOUNG, on NEW PATENT, OFFIC Storm, N. Y.

MACHINE FOR SAWING STONE;

SPECIFICATION forming part of Letters Patent No. 224,760,'dated February17, 1880.

Application filed July 11, 1879.

To all whom itmay concern:

Be it known that I, HUGH YOUNG, of the city, county, and State of NewvYork, have invented certain new and useful Improvements in Machines forSawing Stone, of which the in part or in whole, is not necessarilyrestricted to such description of saws.

The invention consists in certain novel constructions and combinationsof parts whereby a reciprocating saw-sash moving along guides hascombined with it means for feeding and withdrawing the saw toward oraway from said guides; also, means for transmitting a push or liftmotionto the blade or bladeswhen stretched between carriers movable within thesash for the purpose of such feeding and withdrawal without disturbingthe position of either carriers or sashfor the purpose of suchtransmission of the lift motion to the blade;

also, mechanism for communicating to the saw its several motions andadjustments in a simple and efficient manner.

In the accompanying drawings, Figure 1 represents a partly-broken sideview of a stonesawing machine constructed in accordance with theinvention Fig. 2, an end view ofthe same, and Fig. 3 a partly-brokenplan thereof.

A indicates the fixed frame of the machine, and B the reciprocating sawgate or sash. O is the saw-blade, preferably armed with diamonds, borts,or other hard stones. As here iepresented, these parts are arranged toprovide for a reciprocating movement of the blade in anapproximately-horizont-al direction and its sides in a vertical plane;but the machine might be arranged to effect the out in otherdirectionsas, for instance, by arranging the its reciprocating motioncommunicated to it throughany suitable mechanism-such, for

instance, as the rotating shaft D, having its bearings in the fixedframe, the crank c, and connecting-rod d.

The bladev O is not carried directly by the sash, but by carriers E E,which are arranged so as to be capable of a synchronous movement withinthe ends of the sash, or, in other words, of a movement in directions atright angles, or thereabout, to the reciprocating movement of the sashto efiect the feed and withdrawal of the blade, and this withoutaifecting or interfering with the parallelism of the blade to the guidesb b.

The blade 0 is attached to the carriers E E by means of tension bucklesor strapse e.

To provide for the above-described feeding of the blade toward and intoand for its withdrawal from the stone, (the stone, as the ma chine ishere represented, being placed below the blade,) the followingcombination of mechanism is or may be used: F is a rotating shaftarranged on one side of the fixed frame. This shaft carries abevel-pinion, g, which gears with a bevelpinion, h, fast to a sleeve,1', having its bearings in or on the fixed frame. Said sleeve t andpinion h are fitted on a square or feathered shaft, k, arranged indirection of the re ciprocating motion of the sash B, and having itsbearings in or on the latter, so that while the pinion It serves torotate said shaft the latter is free to slide through it.

Fast upon the opposite ends of the shaft are bevel-pinions H, which gearwith bevelpinions m m on feed-screwsG G. These screws tit nuts or femalethreads in the carriers E E, and, accordingly as they are turned, serveto feed or withdraw the blade. This feed and withdrawal movement maybeeffected independently and quickly --as, for instance, through thepulley ffor bringing the blade into position for or away from. its work,or be made to work with slow and adjustable feed through a ratchet orother mechanical means.

When a push or lift motion is to be given to the blade without givingany like mot-ion to the blade-carriers, or to the sash, or to the guideswhich give direction to the reciprocating motion of the sash, (as is thecase in the machine here shown,) the tension buckles or straps c e,which stretch the blade between the carriers E E, are made susceptibleof rocking or flexion, and the power for producing the push or liftmotion in the blade may be brought to somefixed point or points in thesash, as to the shaft n, by any suitable means. In such case I employmechanism for transmitting the power from said point or shaft inthe'sash to the blade stretched between the carriers movable within saidsash.

This mechanism maybe constructed substantially as follows: On the shaft12. is an arm, a, which engages with or between a collared portion, b,of a screw, 0, fitted so as to be capable of sliding up and down throughbearings at one end of the sash B. A similar sliding screw, 0 is fittedto the opposite end of the sash, and the shaft n has a crank, d,.whichis connected, by a rod, 0, with a crank, (1 on a shaft, 01/, at the sameend of the sash as the screw 0 This shaft n is connected, by an arm, M,with a collared portion. b of the screw 0 ,By these means, accordinglyas the shaft 0?. is vibrated, will the two sliding screws 0 c be raisedor lowered. These screws have nutsff fitted on them, and said nuts havelevers g engaging with them. These levers have their fulcrums on theblade-carriers E E, and are arranged so that when-the nuts f f areraised by the sliding motion of the screws 0 0 through the vibrating 'ofthe shaft n in one direction, the blade is kept against the stone and isdisengaged from the stone through the vibrating of the shaft a inanother direction.

In the machine here described the tension of the saw-blade produces itsdisengagement from contact with the work during the return stroke on thewithdrawal of the push above described.

To keep this communication of power for the push or lift motion in thesame relation to the blade, whatever said blades position within thesash, the screws are geared by wheels /b i and h t" with the screws 0 0on which are the nutsf f, in such manner that said nuts are moved at thesame rate of speed as the carriers E E, said wheels being of diameterscorresponding with the pitch of the screws Gr Gr and 0 0 respectively,so as to produce such result.

I do not, however, confine myself to the above means of communicatingthe power for the push or lift motion to the blade when fed within thesash, as other systems of devices may produce the same result; nor do Iconfine myself to the use of any fulcrum for such power on the sashother than the feed-screws for blade-carriers, or their equi\'al'ents,,as the tension-screws c c or their equivalents may be actuatedfrom the fixed frame of the machine without the fulcrumpoint or shaft aon the sash herein described, or any equivalent thereof.

What I claim as my invention, and desire to secure by Letters Patent,is-- 1. In machines for sawing stone, the combination, with areciprocating saw gate or sash, of means for feeding and withdrawing thesaw-blade toward oraway from the guides governing its reciprocatingmotion without impairing the parallelism of the saw-blade to saidguides, substantially as specified.

2. In machines for sawing stone, the combination, with a reciprocatingsaw gate or sash and a saw-blade .fed or withdrawn within said sashtoward or away from the guides governing the reciprocating motion of thesash, of means for imparting a push or lift motion to said blade thusarranged to be fed within the sash without imparting anycorrespond-ingmotion to the carriers between which the blade isstretched, to the sash, or tothe guides govering its reciprocatingmotion.

3. The combination, with the reciprocating sash. B, of the carriers E E,arranged to be fed and withdrawn at, or nearly at, right angles to thereciprocating motion of the sash, and. the blade 0, stretched betweensaid carriers, essentially as and for the purposes specified.

4.. The combination of the sash B, the guides b I), along which saidsash reciprocates, the blade 0, the carriers E E, the feed-screws G G,and mechanism for conjointly operating said screws, essentially asdescribed.

5. The combination, with the sleeye i, of the sliding and rotating shaft70, the recipro cat-in sash B, the carriers E E, the feed-screws G G,and the gears 1 lm m, substantially as shown and described.

The combination. with the reciprocating sash, of carriers for the sawadjustable in a transverse relation with the reciprocating movement ofsaid sash and means, preferably consisting ofyielding tension devices orstraps, connecting the saw with the carriers, so as to admit ofimparting a push or lift motion to the saw independently of said movablecarriers, essentially as described.

7. The combination, with the saw-sash arranged to reciprocate on oralong guides, and with carriers for the saw adjustable within said sashtoward or from the guides, of a shaft or actuating device having a fixedposition on:

the sash and. mechanism for transmitting motion therefrom to thesaw-blade to effect a pushor lift motion of the latter.

8. The combination of the yielding saw tension devices or straps c 0with the carriers E E in the sash B, the levers g g, and the slidingscrews 0 0 essentially-as and for the purposes specified.

9. The combination, with the reciprocating saw-gate and its adjustablesaw-carriers E E, of the feed-screws G G, the screws 0 0 in gear withsaid feed-screws, and. mechanism for straining and relaxing the saw bythe action of the screws 0 0 substantially as specified.

HUGH YOUNG.

Witnesses:

CHANDLER HALL, T. J. KEANE.

IIO

